SpotCloud doesn't support backups or snapshots at this time. Nor does
it support suspend/stop. The reason being - SpotCloud is just a
marketplace for running instances. We intentionally don't provide
typical IAAS features in an effort to present the buyer with the best
possible price.
The disk size for a VM cannot exceed 2GB. Each VM does get a routable
IP address (it will failt to start if it doesn't acquire one). Yes, it
is possible to communicate directly between VMs.
Hope this helps,
Adam